An Alias is if you have ever used a different name or been known as a different name, other than your given birth name.
This does not apply if, for example, your name is Robert and people call you Bob or Rob, or other nicknames.
This would apply if you have changed your name or, for example, your name is John Doe and you have been known to use the name, "John Smith" or "Paul Doe", etc.
* If you are married and changed your name please use the "Maiden Name" option below, not as an "Alias".